Recently, I read someone's observation about the inverse relationship between the relative importance of a binary choice and the vitriol with which they would defend it. Which is to say, when someone has two options (toilet paper over/under, HD DVD/Blu-Ray, one/two spaces after a period), the less important their ultimate choice is, the more earnestly and angrily they will defend it.
At the time, I thought it was a cute koan, but a bit simplistic and not likely to apply in most situations.
Now, having read (or started to read, and ended up skimming) a good fifteen pages of people arguing over the superiority of Macs vs. PCs (with the obligatory mention of Linux in there too), I'm starting to believe it...